CN109939508B - Three-proofing filtering equipment - Google Patents
Three-proofing filtering equipment Download PDFInfo
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- CN109939508B CN109939508B CN201910194567.XA CN201910194567A CN109939508B CN 109939508 B CN109939508 B CN 109939508B CN 201910194567 A CN201910194567 A CN 201910194567A CN 109939508 B CN109939508 B CN 109939508B
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Abstract
The invention relates to the technical field of environmental gas safety protection, and provides a three-proofing filtering device. The equipment comprises a reversing device and a filtering absorber, wherein the reversing device comprises a valve shell and a rotary switch valve arranged in the valve shell, and the rotary switch valve is used for enabling airflow flowing from an air inlet interface to an air outlet interface in the valve shell to selectively pass through the filtering absorber; the inner wall of rotary switch valve and valve casing encloses to establish and is formed with the cavity, the cavity is formed in rotary switch valve's inside, rotatory when making the filter absorber switch-on at rotary switch valve, make cavity and external intercommunication through seting up the first bleeder vent on the valve casing, thereby make the atmospheric pressure in the cavity be less than the atmospheric pressure of rotary switch valve both sides, even if, take place to leak between rotary switch valve and the valve casing, the gas of leaking also can unidirectional flow in the cavity and arrange to the external world by first bleeder vent, toxic/harmful gas has finally been avoided leaking one side of air current after filtering and has caused the injury to the personnel in the internal environment.
Description
Technical Field
The invention relates to the technical field of environmental gas safety protection, in particular to a three-proofing filtering device.
Background
The three-proofing equipment is a general name of equipment and equipment for observing, reconnaissance, protection, decontamination and the like for preventing nuclear, chemical and biological weapon attacks. The main application is to find out the attack of enemy nuclear, chemical and biological weapons, find out the hazard range and degree of radioactive contamination, toxic agent and biological warfare agent, protect, disinfect and eliminate the radioactive contamination, and prevent or reduce the harm to people. The three-proofing equipment is also important equipment for fighting under nuclear, chemical and biological weapon conditions and ensuring the safety and fighting action of troops.
With the development of civilization of military science and technology, civilization three-proofing products are rapidly developed, particularly, in special industries or special environment operation equipment, the external environment needs to be isolated from the internal environment, and toxic/harmful gas in the external environment is allowed to be introduced into the internal environment for personnel to work after being filtered by three-proofing. When the filter is in the environment of non-toxic/harmful gas, the gas in the external environment can be introduced into the internal environment directly or through simple dust removal filtration without being subjected to three-proofing filtration, so that the load of the three-proofing filtration equipment is reduced, and the service life of the three-proofing filtration equipment is prolonged.
Wherein, to switching between three proofings mode and the ordinary ventilation mode, it realizes to utilize the four-way valve usually, because be the sliding seal contact between the valve of four-way valve and the valve casing, so absolute sealed can't be accomplished, and the inlet air current that introduces in the four-way valve is after three proofings filtration equipment filters, gaseous pressure can reduce, there is pressure differential in the both sides of valve promptly, consequently, the inlet air current of higher pressure leaks the one side of exhaust air current easily between valve and the valve casing, lead to the exhaust air current to mix into poisonous/harmful gas from this, cause the injury to personnel in the internal environment.
Disclosure of Invention
In order to solve the above technical problem or at least partially solve the above technical problem, the present application provides a three-proofing filter device.
The three-proofing filtering equipment comprises a valve shell and a rotary switch valve arranged in the valve shell, wherein an air inlet interface, an air outlet interface, a first conversion interface and a second conversion interface are arranged on the valve shell, the first conversion interface and the second conversion interface are correspondingly communicated with an air inlet end and an air outlet end of a filtering absorber, and the rotary switch valve is used for enabling airflow flowing from the air inlet interface to the air outlet interface in the valve shell to selectively pass through the filtering absorber; a cavity is formed by the rotary switch valve and the inner wall of the valve shell in an enclosing manner, and the cavity is formed inside the rotary switch valve; be equipped with first bleeder vent on the valve casing, work as rotary switch valve rotates to the messenger the air current in the valve casing passes through during the gas particulate filter, first bleeder vent with the cavity intercommunication.
Optionally, both ends of the rotary switch valve in the radial direction are provided with first sealing gaskets.
Optionally, a second sealing gasket is arranged on the inner wall of the valve casing and between every two adjacent interfaces, and the second sealing gasket is used for forming sealing fit with two ends of the rotary switch valve in the radial direction.
Optionally, at least one radial end of the rotary switch valve is provided with a groove formed along the axial direction of the rotary switch valve, and at least one second air hole leading to the cavity is formed in the groove.
Optionally, both ends of the rotary switch valve in the axial direction are provided with third sealing gaskets.
Optionally, the third sealing gasket is of an outward convex arc-surface-shaped structure and has elasticity.
Optionally, the air conditioner further comprises a cyclone dust collector, and the cyclone dust collector is communicated with the air inlet interface.
Optionally, the filtering absorber includes a housing, the two ends of the housing are communicated with the first conversion interface and the second conversion interface, and a physical filtering layer and a biochemical filtering layer are sequentially arranged in the housing along the airflow direction.
Optionally, the physical filter layer includes a coarse filter and a high efficiency filter, the coarse filter is woven by a stainless steel mesh, and the high efficiency filter is a wavy structure formed by folding high efficiency filter paper.
Optionally, the air inlet end of the casing is square frustum-shaped, the air outlet end of the casing is cuboid-shaped, and the physical filter layer and the biochemical filter layer are both arranged in the cuboid-shaped structure of the casing.
The three-proofing filtering equipment provided by the invention has the advantages that the filtering absorber is selectively communicated through the reversing device with the four interfaces, wherein the filtering absorber is used for filtering toxic/harmful gas in the air, so that the switching between a common ventilation mode and a three-proofing ventilation mode is realized; in addition, through the inside at the rotary switch valve sets up the cavity, and when the rotary switch valve is rotatory to making the absorber filter switch-on, first bleeder vent and the external intercommunication of seting up on this cavity accessible valve casing, thereby make the atmospheric pressure in the cavity be less than the atmospheric pressure of rotary switch valve both sides, even if take place to leak between rotary switch valve and the valve casing, the gas of leaking also can only one-way inflow in the cavity and is discharged to the external world by first bleeder vent, the one side of poisonous/harmful gas leakage to air current after filtering has finally been avoided, prevent to cause the injury to personnel in the internal environment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic illustration of a general ventilation mode of a three-proofing filter apparatus according to an embodiment of the invention;
FIG. 2 is a schematic illustration of a three proofing ventilation mode of a three proofing filter apparatus of an embodiment of the invention;
FIG. 3 is a schematic view of a reversing device according to an embodiment of the invention;
FIG. 4 is a schematic view of another perspective of a reversing device according to an embodiment of the invention;
FIG. 5 is a cross-sectional view of a reversing device according to an embodiment of the present invention;
FIG. 6 is a schematic view of a rotary switching valve of an embodiment of the present invention in cooperation with a valve housing;
FIG. 7 is a schematic view of a filter absorber of an embodiment of the present invention;
fig. 8 is a gas flow profile for a filter absorber according to an embodiment of the invention.
Reference numerals:
10. a reversing device; 1. a valve housing; 11. an air inlet interface; 12. an exhaust interface; 13. a first conversion interface; 14. a second conversion interface; 15. a first air vent; 16. a second gasket; 2. a rotary switch valve; 21. a cavity; 22. a trench; 23. a second air hole; 3. an electric actuator; 4. a filtration absorber; 41. an air inlet end; 42. an exhaust end; 43. a physical filtration layer; 44. a biochemical filter layer; 5. a cyclone dust collector; 51. a sand discharge passage; 52. a sand discharge valve; 6. three proofings fan.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to.
Furthermore, the term "coupled" is intended to include any direct or indirect coupling. Thus, if a first device couples to a second device, that connection may be through a direct connection, or through an indirect connection via other devices. The following description is of the preferred embodiment for carrying out the invention, and is made for the purpose of illustrating the general principles of the invention and not for the purpose of limiting the scope of the invention. The scope of the present invention is defined by the appended claims.
Referring to fig. 1, 2, 3 and 7, the three-proofing filtering apparatus according to the embodiment of the present invention includes a reversing device 10 and a filtering absorber 4, where the reversing device 10 includes a valve housing 1 and a rotary switch valve 2 disposed in the valve housing 1, the valve housing 1 is provided with an air inlet 11, an air outlet 12, a first switch interface 13 and a second switch interface 14, the first switch interface 13 and the second switch interface 14 are communicated with an air inlet 41 and an air outlet 42 of the filtering absorber 4, and the rotary switch valve 2 is configured to selectively pass through the filtering absorber 4 by an air flow flowing from the air inlet 11 to the air outlet 12 in the valve housing 1.
Referring specifically to fig. 3 and 4, the valve housing 1 has a cylindrical cavity in which the rotary switch valve 2 rotates, and an electric actuator 3 for driving the rotary switch valve 2 to rotate is disposed outside an axial end of the cylindrical cavity; in addition, the above-mentioned air inlet port 11, air outlet port 12, first conversion port 13 and second conversion port 14 are formed on the outer side of the cylindrical cavity in the radial direction, wherein the air inlet port 11 and the air outlet port 12 are disposed adjacent to each other in the circumferential direction, and the first conversion port 13 and the second conversion port 14 are disposed adjacent to each other in the circumferential direction, and further, as a more preferable embodiment, the air inlet port 11 and the air outlet port 12 are directed toward one axial side of the valve housing 1, and the first conversion port 13 and the second conversion port 14 are directed toward the other axial side of the valve housing 1, so that the spatial position of the filter absorber 4 does not interfere with the air inlet line and the air outlet line, thereby realizing the selective passage of the air flow flowing from the air inlet port 11 to the air outlet port 12 through the filter absorber 4. Thus, when the outside air is clean air, the reversing device 10 can be used to make the clean air directly enter from the air inlet port 11 and be discharged from the air outlet port 12, and when the outside air is poisonous/harmful gas, the reversing device 10 can be used to make the poisonous/harmful gas firstly pass through the filter absorber 4 and then be discharged from the air outlet port 12.
As can be seen from the above, since the rotary switching valve 2 is in sliding sealing contact with the valve housing 1, it is impossible to achieve absolute sealing between the rotary switching valve 2 and the valve housing 1, and thus, when the rotary switch valve 2 is rotated to make the air flow in the valve housing 1 pass through the filtering absorber 4, since the filtering absorber 4 has a certain resistance to the air, the gas pressure upstream of the absorber filter 4 tends to be greater than the gas pressure downstream of the absorber filter 4, that is, the gas pressure on the inlet side of the rotary switch valve 2 is greater than the gas pressure on the outlet side, thereby easily mixing part of the poisonous/harmful gas directly through the gap between the rotary switch valve 2 and the valve housing 1 into the filtered exhaust gas flow without passing through the filtering absorber 4, eventually causing toxic/harmful gases to leak into the interior environment, causing harm to personnel in the interior environment.
In this regard, as shown in fig. 5 and 6, the rotary switch valve 2 of the present embodiment and the inner wall of the valve housing 1 enclose to form a cavity 21, that is, the cavity 21 is defined by the rotary switch valve 2 and the inner wall of the valve housing 1, and the cavity 21 is specifically formed inside the rotary switch valve 2. Specifically, the inside of rotary switch valve 2 is empty, and the axial both ends of switch valve casing 1 are uncovered formula structure, the uncovered of both ends and the axial both ends lateral wall sliding seal cooperation of valve casing 1. The valve casing 1 is provided with a first air hole 15, when the rotary switch valve 2 rotates to enable the air flow in the valve casing 1 to pass through the filtering absorber 4, the first air hole 15 is communicated with the cavity 21, namely, the cavity 21 is communicated with the environment outside the valve casing 1 through the first air hole 15.
Because the atmospheric pressure in the two sides of the rotary switch valve 2 in the valve casing 1 is higher than the atmospheric pressure, and after the cavity 21 is communicated with the outside of the valve body through the first air holes 15, the atmospheric pressure in the cavity 21 is equal to the atmospheric pressure. Therefore, the gas leakage between the rotary switch valve 2 and the valve housing 1 can only be generated by the two sides of the rotary switch valve 2 flowing into the cavity 21 inside the rotary switch valve 2 and then discharged out of the valve housing 1 through the first vent holes 15, so that the air flow at the air inlet side of the rotary switch valve 2 will not leak to the air outlet side, i.e. the clean air introduced into the internal environment will not be polluted.
In some embodiments, the two ends of the rotary switch valve 2 in the radial direction are provided with first sealing gaskets (not shown in the figures) which are used for forming sealing fit with the inner wall of the valve housing 1 so as to prevent the intake airflow from leaking from the two ends of the rotary switch valve 2 in the radial direction.
In other embodiments, a second sealing gasket 16 is disposed on the inner wall of the valve housing 1 between every two adjacent ports, and the second sealing gasket 16 is configured to form a sealing fit with two ends of the rotary switch valve 2 in the radial direction, so as to realize another sealing manner between the two ends of the rotary switch valve 2 in the radial direction and the inner wall of the valve housing 1.
Further, as shown in fig. 6, at least one radial end of the rotary switch valve housing 1 is provided with a groove 22 opened along the axial direction of the rotary switch valve 2, the groove 22 is provided with at least one second ventilation hole 23 opened to the inner cavity 21 thereof, when gas leakage occurs between the radial end of the rotary switch valve 2 and the second sealing gasket 16, the leaked gas firstly enters the groove 22, then enters the cavity 21 along the groove 22 via the second ventilation hole 23, and finally is discharged out of the valve housing 1 via the first ventilation hole 15, i.e. the toxic/harmful gas does not leak to the clean air side from the radial end of the rotary switch valve 2.
In some embodiments, the two ends of the rotary switch valve 2 in the axial direction are provided with third sealing gaskets (not shown in the drawings), and the third sealing gaskets are used for enhancing the sealing performance between the two ends of the rotary switch valve 2 in the axial direction and the inner wall of the valve housing 1.
In some embodiments, the third sealing gasket is of a convex arc-surface-shaped structure and has elasticity, during the rotation of the rotary switch valve 2, a radial end of the third sealing gasket is firstly contacted with an arc-surface edge of the third sealing gasket, and along with the rotation of the rotary switch valve 2, the radial end of the third sealing gasket gradually slides towards the center of the arc-surface of the third sealing gasket, and during the process, the third sealing gasket is gradually compressed and forms a tight sealing fit with a radial end of the rotary switch valve 2.
In some embodiments, referring to fig. 1 and 2, the three-proofing filtering device of the present invention further includes a cyclone 5, the cyclone 5 is communicated with the air inlet interface 11, the principle of the cyclone 5 is that the inlet airflow is guided into cyclone by its cyclone blades, the centrifugal force of the cyclone is used to throw the sand into the outer airflow, the part of the outer airflow is discharged to the outside through a sand discharge channel 51 of the cyclone, a sand discharge valve 52 may be disposed on the sand discharge channel 51, and the sand discharge valve 52 acts under the control of the controller; while a relatively clean gas flow in the inner layer is introduced into the reversing device 10 via the inlet connection 11. The upstream of the cyclone dust collector 5 can be provided with a three-proofing fan 6, and the three-proofing fan 6 is used for leading the introduced air to form high-speed airflow in the cyclone dust collector so as to form high-speed cyclone and improve the cyclone dust collection effect.
As shown in fig. 7 and 8, in some embodiments, the filter absorber 4 includes a housing, two ends of the housing are respectively communicated with two ports of the reversing device 10, and a physical filter layer 43 and a biochemical filter layer 44 are sequentially disposed in the housing along the airflow direction.
The physical filtering layer 43 comprises a coarse filter and a high-efficiency filter, wherein the coarse filter is woven by a stainless steel mesh and is mainly used for filtering impurities such as hair, floccules, large-particle dust and the like in air; the high-efficiency filter is a wavy structure formed by folding high-efficiency filter paper, can efficiently filter radioactive dust and biological warfare agents possibly existing in the air during wartime, plays a role in nucleation protection, and has the filtering efficiency of more than 99.99999 percent on particles with the particle size of more than 0.3 mu m.
The biochemical filter layer 44 is mainly based on the adsorption mechanism of a special adsorption material, is used for filtering chemical toxicants in ambient air, adopts a single-box structure, is filled with an inorganic special adsorption material for the protection of sarin and cyanogen chloride, and can also adsorb and remove toxic agents such as perfluoroisobutylene, ethylene oxide and the like.
The air inlet end 41 of the housing is square frustum shaped, the air outlet end 42 is rectangular parallelepiped shaped, and the physical filter layer 43 and the biochemical filter layer 44 are both disposed in the rectangular parallelepiped shaped structure of the housing. Compared with a cylindrical configuration, the square-frustum-shaped air inlet end 41 can enable the entering air to be uniformly distributed to pass through the filtering material, so that toxic gas is not concentrated at a certain point of the filtering material, the filtering material can be prevented from being broken down at the point, and the service life of the filtering material is prolonged.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The three-proofing filtering equipment is characterized by comprising a reversing device and a filtering absorber, wherein the reversing device comprises a valve shell and a rotary switch valve arranged in the valve shell, an air inlet interface, an air outlet interface, a first conversion interface and a second conversion interface are arranged on the valve shell, the air inlet end and the air outlet end of the filtering absorber, which correspond to the first conversion interface and the second conversion interface, are communicated, and the rotary switch valve is used for enabling airflow flowing from the air inlet interface to the air outlet interface in the valve shell to selectively pass through the filtering absorber; a cavity is formed by the rotary switch valve and the inner wall of the valve shell in an enclosing manner, and the cavity is formed inside the rotary switch valve; be equipped with first bleeder vent on the valve casing, work as rotary switch valve rotates to the messenger the air current in the valve casing passes through during the gas particulate filter, first bleeder vent with the cavity intercommunication.
2. The tri-proof filtering device according to claim 1, wherein the rotary switch valve is provided with first sealing gaskets at two ends in the radial direction.
3. The tri-proof filtration device of claim 1, wherein a second gasket is disposed on the inner wall of the valve housing between each adjacent two of the ports, the second gasket being adapted to form a sealing engagement with both ends of the rotary switch valve in the radial direction.
4. The tri-proof filtering apparatus according to claim 3, wherein at least one radial end of the rotary switch valve is provided with a groove opened along the axial direction of the rotary switch valve, and at least one second vent hole leading to the cavity is formed in the groove.
5. The tri-proof filtering device of claim 1, wherein both ends of the rotary switch valve in the axial direction are provided with third sealing gaskets.
6. The tri-proof filtration device of claim 5, wherein the third gasket is of convex arcuate configuration and is resilient.
7. The tri-proof filtration apparatus of claim 1 further comprising a cyclone in communication with said air inlet interface.
8. The three-proofing filtering equipment of claim 1, wherein the filtering absorber comprises a shell, two ends of the shell are correspondingly communicated with the first conversion interface and the second conversion interface, and a physical filtering layer and a biochemical filtering layer are sequentially arranged in the shell along an airflow direction.
9. The tri-proof filtration equipment of claim 8, wherein the physical filtration layer comprises a coarse filter and a high efficiency filter, the coarse filter is woven by stainless steel mesh, and the high efficiency filter is a wave-shaped structure formed by folding high efficiency filter paper.
10. The tri-proof filtration apparatus of claim 8, wherein the air inlet end of the housing is square frustum shaped and the air outlet end is rectangular parallelepiped shaped, and the physical filtration layer and the biochemical filtration layer are both disposed within the rectangular parallelepiped shaped structure of the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910194567.XA CN109939508B (en) | 2019-03-14 | 2019-03-14 | Three-proofing filtering equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910194567.XA CN109939508B (en) | 2019-03-14 | 2019-03-14 | Three-proofing filtering equipment |
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| CN109939508A CN109939508A (en) | 2019-06-28 |
| CN109939508B true CN109939508B (en) | 2021-07-13 |
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| CN201910194567.XA Active CN109939508B (en) | 2019-03-14 | 2019-03-14 | Three-proofing filtering equipment |
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| CN112999780B (en) * | 2021-03-08 | 2022-05-03 | 广西新振锰业集团有限公司 | Chemical waste gas desulfurization and denitrification treatment system and treatment method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0408519A1 (en) * | 1989-07-14 | 1991-01-16 | SOLIS S.r.l. | Filter for use in a suction device for continous removal of textile waste from textile manufacturing machines |
| WO2005029506A2 (en) * | 2003-01-31 | 2005-03-31 | Engineered Support Systems, Inc. | Nbc filtration unit providing unfiltered and filtered air paths |
| CN206207655U (en) * | 2016-11-14 | 2017-05-31 | 中国人民解放军北部战区陆军第二工程科研设计所 | A kind of protective ventilation device |
| CN107131567A (en) * | 2016-02-26 | 2017-09-05 | 大金工业株式会社 | Air cleaning system and its control method |
-
2019
- 2019-03-14 CN CN201910194567.XA patent/CN109939508B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0408519A1 (en) * | 1989-07-14 | 1991-01-16 | SOLIS S.r.l. | Filter for use in a suction device for continous removal of textile waste from textile manufacturing machines |
| WO2005029506A2 (en) * | 2003-01-31 | 2005-03-31 | Engineered Support Systems, Inc. | Nbc filtration unit providing unfiltered and filtered air paths |
| CN107131567A (en) * | 2016-02-26 | 2017-09-05 | 大金工业株式会社 | Air cleaning system and its control method |
| CN206207655U (en) * | 2016-11-14 | 2017-05-31 | 中国人民解放军北部战区陆军第二工程科研设计所 | A kind of protective ventilation device |
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